磁阻传感器测量旋转弹滚转姿态的原理分析

摘要

针对用磁阻传感器测量旋转弹滚转姿态的问题,提出了磁阻传感器滚转角及磁阻传感器滚转角速率的概念,给出了磁阻传感器测量方程和磁阻传感器滚转角速率的测量方程.经过理论推导给出了弹体滚转角速率与磁阻传感器滚转角速率的关系式,分析结果表明弹体滚转角速率与磁阻传感器滚转角速率之间的测量误差受弹丸俯仰姿态、偏航姿态和射向的影响.数值仿真表明,弹丸滚转角速率的地磁测量方法在一定条件下是可行的,但在工程实际应用中难以保证滚转角的精确测量.%Aiming at the roll attitude measurement problem of spinning projectile by using Magnetic Resistance Sensor（MRS）,the concepts of MRS roll angle and MRS Roll Angle Rate（RAR） were presented.The corresponding equations were given.The equation about RAR of projectile and MRS RAR were given through theoretical derivation.The result shows that the measurement error between projectile RAR and MRS RAR is influenced by pitch attitude,yaw attitude and fire direction of projectile.Numerical calculation shows that the geomagnetic measurement method of projectile RAR is feasible under certain conditions,however,the precise measurement of roll angle is difficult to guarantee in application of engineering practice.